Question

(1) Fill in the blanks
(1) The right hand thumb rule is called ............... rule.
(ii) .............. lenses are used for a peep hole in door.
...... is an alloy formed from 90% copper and 10% tin.
(2) Name :
The block of modern periodic table where non-metals are found. (
(3) Write the molecular formula of: Bauxite
(
(B) Choose the correct alternative and rewrite the statements. E
(1) ............. is in liquid state at room temperature.
(a) Iodine (b) Chlorine (c) Bromine (d) Florine
(2) Fe + CuSO4 → FeSO4 + Cu is a ........... type of reaction.
(a) decomposition
(b) combination
(c) displacement
(d) double decomposition
(3) Heat is given out when
(a) water turns to vapour. (b) Ice melts.
(C) water is heated
(d) when vapour condenses to wate
(4) When a ray of light passing through water enters a glass slab
(a) It bends away from normal (6) It bends towards normal
(c) It goes straight without bending (d) It enters back into the wat
(5) When red and blue litmus papers are dipped in MgO solution then.
(a) Red litmus paper turns blue. (b) Blue litmus paper turns red
(c) No change in the litmus papers take place.
(d) litmus paper turns colourless.
Q.2. Answer the following subquestions. (Any FIVE) :
(1) 'X' is the element having atomic No, 2 with the help of informatic
given, answer the following.
Questions: (i) Name the element. (ii) Give its electronic configuratio
(iii) Its group number. (iv) Its period number.
(2) In cold regions in winter the rocks crack due to anomolous expansic
of water. Explain
(3) Write the general properties of ionic compounds.
(4) Give two examples of each : (i) Strong acids (ii) Weak base
DOC​

Answer 1

Answer:

1.right hand thumb rule

2.17

Answer 2

Answer:

Write any five uses of rocks.

Explanation: