Practice Ssc questions set 2 - general science mcq Online Quiz (set-1) For All Competitive Exams

Q-1)   The number of elements in the third period of periodic table is

(a)

(b)

(c)

(d)

Q-2)   Which is a metalloid?

(a)

(b)

(c)

(d)

Q-3)   On moving horizontally across a period, the number of electrons in the outermost shell increases from ...... to ....... .

(a)

(b)

(c)

(d)

Q-4)   Which of these choices is not a family of elements?

(a)

(b)

(c)

(d)

Explanation:

A family of elements consists of elements present in a group of the periodic table.

Q-5)   Consider the following statements:
  1. Maximum covalency of carbon is 4, whereas maximum covalency of silicon is 6.
  2. The maximum covalency of an element is limited to 6.
Which of the statements given above is/are correct ?

(a)

(b)

(c)

(d)

Q-6)   Give thought to following statements.
  1. In the process of osmosis, the solvent moves towards a dilute solution from the concentrated solution.
  2. In reverse osmosis internal pressure but upon a dilute solution.
Among above statements which is/ are correct.

(a)

(b)

(c)

(d)

Q-7)   In an attempt to demonstrate electrical conductivity through an electrolyte, the following apparatus (Fig.) was set up. Which among the following statement(s) is (are) correct?
  1. Bulb will not glow because electrolyte is not acidic
  2. Bulb will glow because NaOH is a strong base and furnishes ions for conduction.
  3. Bulb will not glow because circuit is incomplete
  4. Bulb will not glow because it depends upon the type of electrolytic solution

physical chemistry mcq question answer 9

(a)

(b)

(c)

(d)

Explanation:

NaOH being strong base furnish OH– ions in solution which are responsible for electrolytic condition.

Q-8)   Which one of the following is most electropositive element?

(a)

(b)

(c)

(d)

Q-9)   Consider the following statements :
  1. 22gm. of $CO_2$ consist of 1 mole.
  2. Number of molecules in 4 gm of oxygen is $10^22$.
  3. Mass of 1 mole of a substance is called its formula mass.
Which of these statements above are correct?

(a)

(b)

(c)

(d)

Explanation:

1 mole of CO2 = 44g Mass of 1 mole of a substance is called molar mass.

Q-10)   Which one of the following is not a periodic property i.e., does not show any trend on moving from one side to the other in the periodic table?

(a)

(b)

(c)

(d)