Q1.
Transition metals are generally
Q2.
Transition metals are coloured due to
Q3.
Blister copper is
Q4.
Copper can be extracted from
Q5.
Malachite is
Q6.
Copper is manufactured from
Q7.
Copper pyrites are concentrated by
Q8.
An extremely hot copper wire reacts with steam to give
Q9.
When Cu reacts with AgNO3 solution, the reaction takes place is
Q10.
Copper displaces which metal from their salt solutions
Q11.
Copper is extracted from low grade ore by
Q12.
Which of the following metals will not react with solution of CuSO4?
Q13.
Compound of blue colour is
Q14.
Compound of anhydrous copper sulphate is
Q15.
Anhydrous CuSO4 in laboratory is used to detect
Q16.
Which of the following is an ore of silver?
Q17.
Silver is extracted from its
Q18.
Horn silver is
Q19.
Parke's process is used in the extraction of
Q20.
Which of the following metal is obtained by leaching its ore with dilute cyanide solution?
Q21.
Impurities of lead in silver is removed by
Q22.
Silver obtained from argentiferous lead is purified by
Q23.
Silver gets tarnished in air due to reaction with
Q24.
Silver compound least soluble in water is
Q25.
Zinc is mainly extracted from
Q26.
Spelter is
Q27.
No. of unpaired electrons in Zn2+ is
Q28.
Zn + Cold & very dil. HNO3 gives
Q29.
Which is called philosopher's wool?
Q30.
Which is called Rinmann's green?
Q31.
Zn + conc. H2SO4 →
Q32.
White vitriol is
Q33.
Lucas reagent is
Q34.
Metal used for galvanizing Iron sheets is
Q35.
Cinnabar is an ore of
Q36.
Mercurous ion is represented as
Q37.
Molecular formula of corrosive sublimate is
Q38.
Calomel is
📅MOE 061
Q39.
Which is used as purgative in medicine?
Q40.
When excess SnCl2 is added to HgCl2, a white precipitate turning to grey is obtained. This grey colour is due to the formation of
Q41.
Mercury sticks to the surface of glass when comes in contact with
Q42.
Zinc becomes dull in moist air due to the formation of
Q43.
Zn on reacting with cold dil. HNO3, forms
Q44.
Which of the following is used in making ointment for curing skin diseases?
Q45.
Zinc does not show variable valency, because
Q46.
Which of the following is formed, when H2S is passed through the solution of sodium zincate?
Q47.
ZnO when heated with BaO at 1100°C gives
Q48.
The roasted zinc oxide is converted into zinc by the process of
Q49.
Which is not an ore of iron?
Q50.
Formula of haematite is
Q51.
Brown haematite is
Q52.
Iron is extracted from
Q53.
Purest form of Iron is
Q54.
Iron rendered passive on treatment with
Q55.
Passivity of Iron is due to formation of
Q56.
Highest % of C is present in
Q57.
% of C in steel is
Q58.
Iron reacts with carbon to form
Q59.
Steel contains
Q60.
Carbon percentage is highest in
Q61.
Steel becomes soft & pliable by
Q62.
Nitriding is a process of surface hardening steel by treating it in an atmosphere of
Q63.
If a steel article is heated to redness and then suddenly cooled by plunging into water or oil, it becomes
Q64.
Most stable oxidation state of Iron is
Q65.
Which metal corrodes easily in moist air?
Q66.
Iron gets rust by the action of
Q67.
Rust is
Q68.
Rusting of iron is a chemical reaction. The reaction is
Q69.
Rusting of iron in moist air involves
Q70.
FeSO4.7H2O is known as
Q71.
Mohr's salt is
Q72.
Color of Mohr's salt is
Q73.
Mohr's salt is
Q74.
FeSO4 forms brown ring with
Q75.
Formula of Brown ring is
Q76.
Which among FeO and Fe2O3 is more basic?
Q77.
Oxidation state of Fe in haemoglobin is
Q78.
Iron is obtained on a large scale from Fe2O3 by