Practice Chemistry ncert - general science mcq Online Quiz (set-2) For All Competitive Exams
Q-1) Which of the following is an alkali ?
(a)
(b)
(c)
(d)
KOH; Alkali is a base which are water soluble.
Q-2) Acid turn blue litmus –
(a)
(b)
(c)
(d)
Q-3) Antacids are
(a)
(b)
(c)
(d)
Q-4) Which one of the following is viscous?
(a)
(b)
(c)
(d)
Q-5) A solution reacts with crushed egg–shells to give a gas that turns lime–water milky. The solution contains
(a)
(b)
(c)
(d)
The egg shells are made up of calcium carbonate.
When it reacts with HCl it liberates CO2 gas which turns lime water into milky
$CaCO_3 + 2HCl ⟶ CaCl_2 + H_2O + CO_2$
Q-6) Removal of impurities from ore is known as –
(a)
(b)
(c)
(d)
Q-7) Plaster of paris is made from –
(a)
(b)
(c)
(d)
Q-8) The presence of which of the following acid causes indigestion:
(a)
(b)
(c)
(d)
Q-9) ‘Alum’ is an example of –
(a)
(b)
(c)
(d)
$K_2SO_4 + Al_2(SO_4)_3 .24H_2O$ ⟶ Alum
Q-10) Which of the following is not a hydrated salt?
(a)
(b)
(c)
(d)
Baking soda is NaHCO3
Q-11) Antacids are commonly used to get rid of acidity in the stomach. A commonly used antacid is
(a)
(b)
(c)
(d)
Q-12) The acid in gastricjuice is
(a)
(b)
(c)
(d)
Q-13) Which one among the following is not a property of salt?
(a)
(b)
(c)
(d)
Q-14) Which of the following is ‘quicklime’ –
(a)
(b)
(c)
(d)
Q-15) Bleaching powder is soluble in cold water giving a milky solution due to –
(a)
(b)
(c)
(d)
Bleaching powder is actually a mixture of calcium hypochlorite CaOCl2 and the basic chloride CaCl2 with some slaked, Ca(OH)2 .
Q-16) Chemical formula of baking soda is –
(a)
(b)
(c)
(d)
Q-17) Food cans are coated with tin and not with zinc because
(a)
(b)
(c)
(d)
Q-18) Plaster of paris has the formula –
(a)
(b)
(c)
(d)
Q-19) Goldsmiths uses aqua regia, which is prepared by mixing
(a)
(b)
(c)
(d)
Q-20) Which of the following compounds is basic in nature ?
(a)
(b)
(c)
(d)