Skip to main content

MCQs on Chemical Reactions and Equations, class 10 science | Physics Advocate

Multiple Choice Questions

Q1.

The removal of Hydrogen from a substance is known as ----

(i) oxidation

(ii) dehydration

(iii) reduction

(iv) crystallisation


Q2.

The development of unpleasant smell and taste in fat and oil containing foods due to aerial oxidation is ----

(i) acidity

(ii) rancidity

(iii) displacement

(iv) sublimation


Q3.

In order to obtain a yellow precipitate from Lead Nitrate, you should mix a solution of ----

(i) Potassium Chloride

(ii) Potassium Iodide

(iii) Potassium Bromide

(iv) Potassium Cyanide


Q4.

In exothermic reactions ----

(i) thermostat is required

(ii) energy is released

(iii) Energy is absorbed

(iv) None of the above


Q5.

Find a & b in -

(i) a = 1, b = 1

(ii) a = 1, b = 2

(iii) a = 3, b = 1

(iv) a = 2, b = 1


Q6.

Which gas/gases are released when FeSO4 is heated?

(i) Sulphur Dioxide

(ii) Sulphur Trioxide

(iii) Both (i) & (ii)

(iv) None of these


Q7.

Which compound is used in black and white photography?

(i) Silver Chloride

(ii) Silver Oxide

(iii) Aluminium Oxide

(iv) Aluminium Chloride


Q8.

When Lead Nitrate is heated, which gas & of which colour did you notice?

(i) colourless Carbon Dioxide

(ii) colourless Nitrogen gas

(iii) brown Sulphur Dioxide

(iv) brown Nitrogen Dioxide


Q9.

Which is not a characteristic of chemical reactions?

(i) change in colour

(ii) change in state

(iii) change in magnetic field

(iv) evolution of a gas


Q10.

What will happen when dilute H2SO4 reacts with Zn?

(i) Hydrogen gas evolve

(ii) Carbon dioxide gas evolve

(iii) Zinc oxide formed

(iv) Zinc carbonate formed


Q11.

Electrolysis of water is a ----.

(i) Combination reaction

(ii) displacement reaction

(iii) double displacement reaction

(iv) None of these


Q12.

In this reaction,

(i) Chlorine is the reducing agent

(ii) Hydrogen sulphide is the oxidising agent

(iii) Both (i) & (ii)

(iv) None of these

Comment down your thoughts :-)

---------------------------------------------------------------------------------

ANSWERS

Ans1. (i)

Ans2. (ii)

Ans3. (ii)       Ans4. (ii)

Ans5. (iv)

Ans6. (iii)     Ans7. (i)

Ans8. (iv)

Ans9. (iii)     Ans10. (i)

Ans11. (iv)

Ans12. (iv)

LIGHT chapter... Reflection & Refraction ( Full YouTube PLAYLIST )

CLICK HERE

by   www.advguruji.blogspot.com



Comments

  1. Quality of questions, Easy to recap the topic.

    ReplyDelete

Post a Comment

Popular posts from this blog

Age problems (for practice) | class 10 mathematics | advguruji | Physics Advocate

Linear Equations Q1. Ten years ago, father was twelve times as old as his son and ten years hence, he will be twice as old as his son will be. Find their present ages. Ans. Present age of father = 34 years          Present age of son = 12 years Q2. Three years ago, Priya's mother was six times older than her. Four years from now, Priya's mother will be one year older than thrice her age. Find the present age of Priya and her mother. Ans.  Present age of Priya = 8 years       Present age of mother = 33 years Q3. Five years ago, Rakesh was five times younger than his mother. Ten years from now, his age will be half of his mother's age. Find the present age of Rakesh and his mother. Ans. Present age of Rakesh = 10 years      Present age of mother = 30 years Q4.           (equation in one variable) A  is elder to  B  by two years. A's father  F  is twice as old as  A .  ...

Multiple Choice Questions (MCQs) on fluid mechanics class 11 : Physics advocate/advguruji

Best of Luck Q1. Hairs of shaving brush cling together when it is removed from water due to- (a) force of attraction between hair (b) surface tension (c) viscosity of water (d) characteristic property of hair Q2. Coatings used on raincoat are waterproof because they - (a) increases angle of contact (b) decreases angle of contact (c) does not alters angle of contact (d) forms a smooth surface Q3. A body measures 5 N in air and 2 N when put in water. The buoyant force is- (a) 7 N (b) 9 N (c) 3 N (d) None of these Q4. A hole is made at the bottom of the tank filled with water (density = 1000 kg/m³). If the total pressure at the bottom of the tank is three atmospheres (1 atmosphere = 10⁵ N/m²), then the velocity of efflux is nearest to- (a) 20 m/s (b) 10√2 m/s (c) 20√2 m/s (d) √500 m/s Q5. When the temperature is increased the angle of contact of a liquid? (a) increases (b) decreases (c) remains the same (d) first increases and then decreases Q6. The surface tension of a soap solution is 2...

Problems on acceleration due to gravity and variation of acceleration due to gravity, class 11 | Physics Advocate

Q1. Calculate the percentage decrease in the weight of a body when it is taken to a height of 40 km above the Earth's surface. Radius of Earth = 6,400 km Ans. 1.25% Q2. Calculate the depth below the surface of Earth where the acceleration due to gravity is 25% of its value at the Earth's surface. Take, radius of Earth = 6,400 km. Ans. 4.8 × 10⁶ m Q3. A body weighs 100N on Earth's surface. Calculate the gravitational force on the body at a height equal to one-fourth the radius of Earth. Ans. 64 N Q4. Calculate the percentage decrease in weight of a body when taken to a tunnel 38.4 km below the Earth's surface. Ans. 0.6% Q5. Calculate the height from the Earth's surface at which the acceleration due to gravity becomes 75% compared at Earth's surface. Take, radius of Earth = 6,400 km. Ans. 990 km ---------------------------------------------------------------------------------------------- EXTRA QUESTIONS Q6. Find the percentage increase in acceleration due to grav...