Practice Question bank - general science mcq Online Quiz (set-1) For All Competitive Exams

Q-1)   Which is not a Lewis acid?

(a)

(b)

(c)

(d)

Q-2)   Arrange the following bases in increasing order of their, basic strength
  1. Sodium hydroxide
  2. Magnesium hydroxide.
  3. Aluminium hydroxide
  4. Ammonium hydroxide
Select the correct answer using the code given below Codes: A B C D

(a)

(b)

(c)

(d)

Q-3)   Which of the following statements regarding oxidation and reduction are correct?
  1. In oxidation, loss of electron takes place whereas in reduction, gain of electron takes place.
  2. In oxidation, gain of electron takes place whereas in reduction, loss of electron takes place.
  3. Oxidizing agent decreases the oxidation number but reducing agent increases the oxidation number.
  4. Oxidizing agent increases the oxidation number but reducing agent reduces the oxidation number.
Select the correct answer using the code given below : Code :

(a)

(b)

(c)

(d)

Q-4)   Match List-I with List-II:
List-I List-II
A. Washing soda 1. Sodium Hydroxide
B. Caustic soda 2. Copper Sulphate
C. Neela thotha 3. Sodium Thiosulphate
D. Hypo 4. Sodium Carbonate
Select the correct answer using the codes given below the list: Code (A) (B) (C) (D)

(a)

(b)

(c)

(d)

Explanation:

Q-5)   The reaction of metal with acid results in the formation of–

(a)

(b)

(c)

(d)

Explanation:

e.g. Na + HCl ⟶ NaCl + $1/2H_2$

Q-6)   Select the one that is having pH < 7.

(a)

(b)

(c)

(d)

Explanation:

Lime juice [Hint : Lime juice is acidic so its pH < 7.].

Q-7)   Slaked lime is prepared by adding water to –

(a)

(b)

(c)

(d)

Explanation:

CaO + $H_2O ⟶ Ca(OH)_2$

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)

Explanation:

$K_2SO_4 + Al_2(SO_4)_3 .24H_2O$ ⟶ Alum

Q-10)   Acids are ____________ in taste while bases are ____________ in taste.

(a)

(b)

(c)

(d)

Explanation:

All acids are sour in taste, like tartaric acid in tamarind and acetic acid in vinegar while all bases are bitter in taste like baking soda.