acids, bases, salts and metals - Category wise Question and Answer Practice Test with Solutions

Question : 26 [IAS Prelim]

Which one of the following materials is very hard and very ductile?

a) Cast iron

b) Carborundum

c) Tungsten

d) Nichrome

Question : 27 [IAS Prelim]

‘Yellow cake’, an item of smuggling across border is

a) uranium oxide

b) a crude form of heroin

c) a crude form of cocaine

d) unrefined gold

Question : 28 [PSC (Pre) 2018]

Match List-I with List-II and select the correct answer using the codes given below the lists:

a) 4 3 2 1

b) 3 4 1 2

c) 3 4 2 1

d) 4 3 1 2

Question : 29 [NDA]

Which one among the following is a double salt ?

a) CuSO₄ · 5H₂O

b) K₄[Fe(CN)₆]

c) K₂SO₄ · A1₂(SO₄)₃ · 24H_2O

d) NaCl

Question : 30

Baking powder is

a) a compound

b) an element

c) a mixture

d) a salt