1. Translucent objects are the objects to which we go?

(a) Can not see at all

(b) can clearly see

(c) can see, but not very clearly

(d) None of the above Can see 

ANS. (C), but not very clearly

2. Soda Lime is a mixture of which of the following?

(a) PhOH + CaO

(b) NaOH + Ca (OH),

(c) Na2CO + CaO

(d) CaCO + NaOH

ANS. (B) NaOH + Ca (OH),

3. What are the images formed by a plane mirror which cannot be obtained on the screen?

(a) real

(b) virtual

(c) Imaginary

(d) duplicate

ANS. (B) virtual

4. Which of the following is not an example of capillary action?

(a) Increase of water in straw

(b) shedding of tears through tear ducts

(c) Formation of soap bubbles

(d) Absorption of ink by blotting paper

ANS. (C) Formation of soap bubbles

5. What is the network of air duct for exchange of gases in insects?

(a) Schwannlaki (trachea)

(b) Spikele

(c) bronchus

(d) tube

ANS.

6. By which process does water evaporate through the stomata present on the surface of the leaves?

(a) Photosynthesis

(b) transpiration

(c) Transport

(d) evaporation

ANS. (A) Photosynthesis

7. Which one of the following is an electronegative element?

(a) lithium

(b) sodium

(c) Magnesium

(d) Fluorine

ANS. (D) Fluorine

8. In which type of chemical reaction can a more reactive metal replace a less reactive metal?

(a) displacement

(b) Dismissal

(c) Separation

(d) redox

ANS. (A) Displacement

9. Some examples are polythene and PVC.

(a) thermosetting plastic

(b) thermoplastic

(c) acrylic

(d) No option is correct.

ANS. (B) Thermoplastic

10. Which chemicals used in refrigerators (refrigerators), air conditioners (AC) and aerosol sprays make air pollutants?

(a) Sulfur dioxide

(b) nitrogen dioxide

(c) Chlorofluorocarbons

(d) Methane

ANS. (C) Chlorofluorocarbons