NCERT Exemplar Solutions for Chapter 1 Chemical Reactions and Equations Class 10 Science
Short Answer Type Questions
1. Write the balanced chemical equation for the following equations for the following reaction and identify the type of reaction in each case.
(a) Nitrogen gas is treated with hydrogen gas in the presence of a catalyst at 773 K to form ammonia gas.
(b) Sodium hydroxide solution is treated with acetic acid to form sodium acetate a
Online Test of Chapter 12 Electricity MCQ Class 10th Science
Questions :-
1. Which of the following is true regarding Ammeter and Voltmeter?
(a)Ideal Ammeter is having infinite resistance
(b)Ideal Voltmeter is having Zero resistance
(c)Ideal Voltmeter is having Infinite Resistance
(d)None of These
2.A resistance of 3Ω is connected in series with 5Ω. This connection is kept in parallel with a 8Ω resistance. The current in 5Ω resistance if 24V potential
Online Test of Chapter 12 Electricity MCQ Class 10th Science
Questions :-
1.How the charge will flow?
(a)By heating them
(b)By applying potential difference
(c)Both
(d)None of the above
2.If length of a conductor and it’s radius is increased twice, how the resistance will change?
(a)Resistance will remain unchanged
(b)Resistance increases twice
(c)Resistance will become half
(d)Resistance will increase 4 times
3. The potential difference applied is di
Online Test of Chapter 11 Human Eye and Colourful World MCQ Class 10th Science
Questions :-
1.The human eye forms the image of an object at its
(a)Corena
(b)Iris
(c)Pupil
(d)Retina
2.The least distance of distinct vision for a young adult with normal vision is about
(a)25m
(b)20cm
(c)25cm
(d)20m
3. The persistence of vision for normal eye is( in seconds)
(a)1/16
(b)1/8
(c)1/5
(d)1/12
4. Which of the following will have most refractive index for same
Online Test of Chapter 11 Human Eye and Colourful World MCQ Class 10th Science
Questions :-
1. Defect of Vision Near sightedness also known as
(a)Hypermetropia
(b)Myopia
(c)Presbyopia
(d)None of this
2. The focal length of eye does not reduce less than a certain limit (more than normal eye near point) is known as
(a)Myopia
(b)Hypermetropia
(c)Near sightedness
(d)Both (a) and (c)
3.The focal length of eye does not increase beyond a limit is known as
(a
Online Test of Chapter 4 Carbon and its Compounds Science| Class 10th
Questions :-
1. Alcohols can be converted to carboxylic acid by _____________
(a) Oxidation
(b) Reduction
(c) Both of these
(d) None of these
2. An atom or a group of atoms which when present in a compound gives specific properties are called ______________
(a) Combustion
(b) Substitution
(c) Functional group
(d) None of these
3. Unsaturated hydrocarbon adds hydrogen in presence of
Online Test of Chapter 4 Carbon and its Compounds Science| Class 10th
Questions :-
1. The bond formed by sharing of electron pair between two atoms is known as ___________
(a) Covalent bond
(b) Electrovalent bond
(c) Co – ordinate covalent bond
(d) None of these
2. Which compounds have low melting point and boiling point?
(a) Co – ordinate covalent bond
(b) Electrovalent bond
(c) Covalent bond
(d) None of these
3. General formula of alkane is ________
Online Test of Chapter 13 Magnetic Effects of Electric Current MCQ Class 10th Science
Questions :-
1. Which of the following is not true about Magnetic field Lines?
(a)Are always north to side outside magnet
(b)Are always south to north inside the magnet
(c)Are always north to south inside the magnet
(d)Has tangential direction at curves
2.Which of the following is strongest magnet?
(a)Ferrite
(b)Alnico
(c)Iron
(d)Electromagnet used in crane
3. The di
Online Test of Chapter 13 Magnetic Effects of Electric Current MCQ Class 10th Science
Questions :-
1.The magnetic force experienced by the given conductor will be in which direction according to the figure
(a)Opposite to direction of current flow
(b)Outside paper
(c)Inside Paper
(d)In the direction of current flow
2. The split rings present in the DC electric motor is used to
(a)Rotate motor
(b)Change direction of current in the coil
(c)Keeps direction
Online Test of Chapter 10 Light Reflection and Refraction MCQ Class 10th Science
Question :-
1. Which of the following is not due of refraction?
(i)The bottom of bucket seems elevated
(ii)Rainbow Formation
(iii)Inverted Image Formed in spoon
(iv)Star appears twinkling
2. How the focal length will vary if the lens is kept in water?
(i)It will increase
(ii)It will decrease
(iii)It will remain same
(iv)It will no longer work as lens
3. A convex mirror is