GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 111

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 111

1101). Plaster of parts has the molecular formula

A). CaSO4 .H2O

B). CaSO4 .2 H2O

C). CaSO4 .1/2H2O

D). CaSO4 .1 1/2 H2O

Answer: CaSO4 .1/2H2O

   

1102). Ozone depletion in the atmosphere is mainly caused by

A). SO2

B). NO2

C). NO

D). CFC

Answer: CFC

   

1103). Consider the following Statements :

MnO2+4HCl-->MnCl2+2H2O

In the above reaction,

Assertion (A): MnO2 is an oxidising agent.

Reason (R): The oxidation number of Mn is decreased from +4 to +2

Now select your answer according to the coding scheme given below:

A). Both (A) and (R) are true and (R) is the correct explanation

B). Both (A) and (R) are true, but(R) is not the correct explanation of (A)

C). (A) is true, but (R) is false

D). (A) is false, but (R) is true

Answer: Both (A) and (R) are true and (R) is the correct explanation

   

1104). The method(s) used to determine the equivalent masses of elements is/are

I) Chloride method

II) Oxide method

III) Metal displacement method

IV) hydrogen displacement method

Of these:

A). (I) alone is correct

B). (I) and (III) are correct

C). (I), (ll) and (III) are correct

D). All are correct

Answer: All are correct

   

1105). Match List I with List ll correctly and select your answer using the codes below:

List l                                          List II

a) Sulphide ore                1) Gravity separation method

b) Oxide ore                    2) Electromagnetic separation method

c) Bauxite ore                  3) Forth Flotation Process

d) Tinstone are                4) Chemical method

Codes:

a b c d

A). 1 4 2 3

B). 1 2 4 3

C). 3 1 4 2

D). 3 4 2 1

Answer: 3 1 4 2

1106). Find the wrong pair:

A). CH3-CH2-O-CH2-CH3

B). CH3-CH2-CH2-CH3

C). CH3-C-CH3 - Ketone

D). CH3-CH2-OH

Answer: CH3-CH2-OH

   

1107). The soluble fibrinogen is converted into soluble fibrin by the action of

A). Thrombin

B). Prothrombinase

C). Thrombase

D). Thrombokinase

Answer: Thrombin

   

1108). The carbon dioxide dissolved in water

A). enhances corrosion

B). suppresses corrosion

C). prevents corrosion

D). has no influence on corrosion

Answer: enhances corrosion

   

1109). Nylon is a

A). polyester

B). polyethylene

C). polyamide

D). polysaccharide

Answer: polyamide

   

1110). One caret of diamond is

A). 100 mg

B). 200 mg

C). 300 mg

D). 400 mg

Answer: 200 mg