Q1.
When NH4Cl is added to NH4OH, its pH:
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Q2.
The number of molecules of CaCO3 that remains when 1 mole of CaCO3 is allowed to react with 1 mole of HCl are:
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Q3.
60 gm of compound on analysis produced 24gm carbon, 4 gm hydrogen and 32 gm oxygen. The empirical formula of compound is:
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Q4.
Ozone which is used to bleach delicate fiber is a mixture of:
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Q5.
In the reaction KMnO4(aq) + H2SO4(aq) -> MnSO4(aq) + K2SO4(aq) + H2O(l) + O2(g), Mn is:
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Q6.
Both phenol and ethyl alcohol contain -OH group but phenol is much acidic than ethyl alcohol due to the:
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Q7.
When ethyl alcohol is heated with excess of concentrated sulphuric acid at about 160-170°C, it produces:
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Q8.
Calomel is:
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Q9.
How many moles of CO2 are present in 220 mg?
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Q10.
Chlorine acts as a bleaching agent in the presence of:
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Q11.
Nature of bond formed when two elements react depend upon:
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Q12.
Aqueous solution of SO2 reacts with H2S to precipitate sulphur. Here SO2 acts as:
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Q13.
The reaction at cathode during the electrolysis of aqueous solution of NaCl is:
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Q14.
If the rate of reaction becomes twice for every 10°C rise in temperature, by what factor the rate of reaction increases when temperature is increased from 25°C to 75°C?
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Q15.
Rusting of iron in moist air involves:
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Q16.
CHCl3 is stored in dark coloured bottles, because:
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Q17.
Liquor poisoning is due the presence of:
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Q18.
A sample of water from a well in Terai contains 0.1mg Arsenic per litre. What is the concentration of Arsenic in ppm?
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Q19.
When two atoms of hydrogen combine to form a molecule of hydrogen gas. The energy of the molecule is:
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Q20.
Dehydration of ethanol yields:
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Q21.
The atomic number of Nitrogen is 7 and the atomic number of Oxygen is 8. The total number of electrons in a Nitrate ion (NO3^-) is:
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Q22.
When C2H5OH is treated with acidic K2Cr2O7, it forms CH3CHO. It is an example of:
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Q23.
One kilogram of water contains 4gm of NaOH. The concentration of the solution is best expressed as:
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Q24.
Which of the following has highest boiling point?
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Q25.
If one mole of methane is converted into products, then which one of the following statement is true?
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Q26.
Which one of the following complex compound has an incorrect formula?
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Q27.
Which of the following are isomers?
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Q28.
A solution of Sodium in liquid Ammonia is blue due to the presence of:
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Q29.
Which of the following electronic configuration given for some neutral atoms would be expected to have highest second ionization energy (IE2)?
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Q30.
When temperature of gas is increased its viscosity:
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Q31.
The maximum wavelengths emitted by the sun at the temperatures (in Kelvin) T1, T2 and T3 are 650 nm, 510 nm and 350 nm respectively. Which one of the following is correct?
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Q32.
Two ebonite rods A and B of radii 1.5cm and 2cm respectively are rubbed together. The result will be:
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Q33.
Power of ionization of a gamma particle is:
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Q34.
Activity of 1.85 * 10^11 disintegration per second is nearly equivalent to:
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Q35.
The specific gravity of sugar is 1.59. Which one is its correct density in S.I. system?
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Q36.
If a base ball player can throw a ball to a maximum distance = d over a ground, what is the maximum vertical height to which he can throw it? (Assume that the ball has same initial speed in each case):
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Q37.
When an elastic material with young's modulus 'Y' is subjected to a stretching stress 'S' the elastic energy stored per unit volume of material is:
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Q38.
Two drops of water having same radius moving in air downwards with constant velocity v. If the drops coalesced, what will be the new velocity?
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Q39.
The radius of hydrogen atom in the ground state is 0.53Å. After excitation, it is found that this radius increases to 2.12Å. The value of principle quantum number will be:
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Q40.
What is the value of -40° Fahrenheit in Celsius scale?
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Q41.
What is the potential drop across an electric hot plate which draws 5 A when its hot resistance is 24Ω?
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Q42.
A refrigerator has to transfer an average of 250J of heat per second from -10°C to 25°C. The average power consumed by the refrigerator is:
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Q43.
A tube closed at one end containing air column excited produces the fundamental note of frequency 512 Hz. If the tube is open at both ends the fundamental frequency that can be excited is:
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Q44.
The pendulum of clock is made of brass. If the clock keeps correct time at 20°C, how many seconds per day will it lose at 35°C? (alpha_brass = 2 * 10^-5 / °C):
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Q45.
A body cools down from 65°C to 60°C in 5 minutes. It will cool down 60°C to 55°C in:
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Q46.
An object is placed at a distance 'u' from simple microscope of focal length 'f'. The angular magnification obtained depends:
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Q47.
A parallel plate capacitor is charged and the charging battery is then disconnected. If the plates of the capacitor are moved further apart by means of insulating handles:
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Q48.
A thin stream of water from a tap is attracted by placing a rod near it. The rod is:
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Q49.
If the current in an electric bulb drops by 2%, the power decreases by:
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Q50.
Two thin lenses of focal lengths f1 and f2 are in contact. The effective focal length of the combination is:
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Q51.
When a light wave travels from an optically rarer medium to a denser medium, its speed:
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Q52.
Critical angle for a pair of media is minimum for which of the following colors of light?
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Q53.
The phenomenon of interference of light proves that light has:
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Q54.
In a Young's double slit experiment, if the distance between the slits is halved and the distance to the screen is doubled, the fringe width becomes:
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Q55.
A charge q is placed at the center of a cube of side L. The total electric flux passing through all six faces of the cube is:
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Q56.
The electric potential at a distance r from an isolated point charge q varies as:
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Q57.
The internal resistance of an ideal cell/battery is:
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Q58.
When a piece of copper and another of germanium are cooled from room temperature to 80 K, the resistance of:
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Q59.
A magnetic field can be produced by:
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Q60.
The self-inductance of a solenoid is directly proportional to:
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Q61.
In an alternating current circuit containing an ideal inductor only, the phase difference between current and voltage is:
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Q62.
The working of an alternating current generator is based on the principle of:
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Q63.
Which of the following electromagnetic waves has the shortest wavelength?
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Q64.
The work function of a metal surface depends upon:
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Q65.
According to Bohr's theory, the angular momentum of an electron rotating in the nth stable orbit is an integral multiple of:
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Q66.
During a nuclear fusion reaction:
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Q67.
The major charge carriers in a p-type semiconductor are:
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Q68.
The decimal equivalent of binary number (1011)_2 is:
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Q69.
Universal logic gates are:
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Q70.
Which one of the following is an echinoderm?
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Q71.
Syngamy occurs during the formation of:
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Q72.
During hibernation and aestivation, the respiration in frog is:
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Q73.
Serum is:
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Q74.
Carrier of genetic information is:
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Q75.
Which of the primate is the closest relative of man?
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Q76.
Dengue Fever is caused by the bite of:
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Q77.
The total duration of cardiac cycle is:
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Q78.
Hormone which regulates metamorphosis of tadpole is:
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Q79.
Octopus belongs to:
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Q80.
Blastopore in the vertebrates develops into:
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Q81.
Anadromous fishes move from:
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Q82.
Organs of corti cells are related with:
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Q83.
In a flowering plant when pollen grains of flower are transferred to the stigma of another flower on the same plant, it is known as:
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Q84.
The element that is not very mobile and remains fixed to mitochondria and chloroplast is:
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Q85.
The nitrifying bacteria convert:
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Q86.
Which group of plants assimilates maximum CO2 annually by means of photosynthesis?
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Q87.
Polymerase Chain Reaction (PCR) is used for:
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Q88.
Every carbohydrate is:
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Q89.
Totipotency refers to the:
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Q90.
The process of chain elongation of amino acids during protein synthesis is called:
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Q91.
The bacteria which grow best as aerobes but can grow without oxygen also are:
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Q92.
The molecular similarities in the structure of DNA, RNA and comparable proteins help:
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Q93.
The sporangia of fern develop on:
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Q94.
Agaricus the edible mushroom belongs to:
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Q95.
Which of the following is parasitic form of algae?
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Q96.
The end product of glycolysis in plant is:
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Q97.
Viruses have:
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Q98.
Water rises through the xylem mainly by:
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Q99.
Which of the following is used in industrial preparation of ethanol?
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Q100.
Lichens represent symbiosis between:
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Q101.
Viviparous germination can be observed in:
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Q102.
Which one of the following group of plants is devoid of true nucleus?
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