std 9 Science term 1st
Q 1. A) Complete the analogy
Crystalline ferrous sulphate : : Crystalline copper sulphate ____________
B) State true or false, if false write the correct statement.
Molecular state of oxygen is diatomic.
C) Fill in the blanks.
The magnitude of charge on any radicle is its ___________
D) Complete the box V=
E) Think and tell.
When an object is at rest in the beginning of its motion, what is its initial velocity ?
F) Rewrite the statement by choosing correct alternatives.
1. If an object is moving with a uniform velocity _______
a) its speed remains the same, but direction of motion changes.
b) its speed changes but direction of motion is same
c) its speed and direction both change.
d) its speed and direction both remain the same.
2. The potential energy of your body is least when you are ________
a) sitting on a chair b) sitting on the ground c) sleeping on the ground d) standing on the ground
3. The ________ wire is yellow or green in colour .
a) earth b) Live c) Neutral d) fuse
4. _________ g of water makes 1 mole of water.
a) 36 b) 18 c) 54 d) 16
5. The positive terminal electrode is called ________
a)anode b) cathode c) anion d) cation
Q 2. Answer the following.
1. Explain the following chemical reactions with the help of balanced equations.
a) Zinc reacts with dilute sulphuric acid.
b) when sodium bicarbonate reacts with dilute hydrochloric acid.
2. Differentiate between acids and bases.
3.write the valencies of H, Cl,Na & C.
4. write down the symbols for the following elements.
Antimony, Lead, Gold & Mercury
5. A current of 0.25 A flows through a conductor when a potential difference of 25 V is applied between its Two ends. What is its resistance ?
6. What will happen in the following cases ?
a) A fast cricket ball strikes the stumps. b) The striker hits a coins on the carom board.
7) Give reasons Even though the magnitudes of action force and reaction force are equal and their directions are opposite, their effects do not get cancelled.
Crystalline ferrous sulphate : : Crystalline copper sulphate ____________
B) State true or false, if false write the correct statement.
Molecular state of oxygen is diatomic.
C) Fill in the blanks.
The magnitude of charge on any radicle is its ___________
D) Complete the box V=
E) Think and tell.
When an object is at rest in the beginning of its motion, what is its initial velocity ?
F) Rewrite the statement by choosing correct alternatives.
1. If an object is moving with a uniform velocity _______
a) its speed remains the same, but direction of motion changes.
b) its speed changes but direction of motion is same
c) its speed and direction both change.
d) its speed and direction both remain the same.
2. The potential energy of your body is least when you are ________
a) sitting on a chair b) sitting on the ground c) sleeping on the ground d) standing on the ground
3. The ________ wire is yellow or green in colour .
a) earth b) Live c) Neutral d) fuse
4. _________ g of water makes 1 mole of water.
a) 36 b) 18 c) 54 d) 16
5. The positive terminal electrode is called ________
a)anode b) cathode c) anion d) cation
Q 2. Answer the following.
1. Explain the following chemical reactions with the help of balanced equations.
a) Zinc reacts with dilute sulphuric acid.
b) when sodium bicarbonate reacts with dilute hydrochloric acid.
2. Differentiate between acids and bases.
3.write the valencies of H, Cl,Na & C.
4. write down the symbols for the following elements.
Antimony, Lead, Gold & Mercury
5. A current of 0.25 A flows through a conductor when a potential difference of 25 V is applied between its Two ends. What is its resistance ?
6. What will happen in the following cases ?
a) A fast cricket ball strikes the stumps. b) The striker hits a coins on the carom board.
7) Give reasons Even though the magnitudes of action force and reaction force are equal and their directions are opposite, their effects do not get cancelled.
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