chemistry: exp. Test 2023

written by gogorabei | June 19, 2023

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#1. 29)On connecting lead accumulator to an external source of electricity its emf =14 V. Which one of the following choices is correct …..

a)decreasing the pOH value of electrolyte

a)decreasing the pOH value of electrolyte

b)decreasing the pH value of electrolyte

b)decreasing the pH value of electrolyte

c)increasing oxidation number of lead at anode

c)increasing oxidation number of lead at anode

d)increasing the quantity of water in battery

d)increasing the quantity of water in battery

#2. 30) The general formula of two organic acids are: A: C2H4O2 B: C2H2O4 Which one of the following choices is correct …..

a)Boiling point of (B) more than boiling point of (A)

a)Boiling point of (B) more than boiling point of (A)

b)Reduction of compound (A) produces simplest alcohol

b)Reduction of compound (A) produces simplest alcohol

c)Reduction of compound (B) produces compound used in thermometer

c)Reduction of compound (B) produces compound used in thermometer

d)Solubility of compound (A) in water more than solubility of (B)

d)Solubility of compound (A) in water more than solubility of (B)

#3. 31)Which one of the following salts gives a gas and a precipitate on adding Hydrochloric acid at suitable conditions?

a)NaNO2

a)NaNO2

b)AgNO3

b)AgNO3

c)HgNO3

c)HgNO3

d)Pb(NO2)2

d)Pb(NO2)2