CBSE Class X – Science Chemistry + Biology + Physics Exam (Full Syllabus)

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CBSE Class X – Science Chemistry + Biology + Physics Exam (Full Syllabus)

This test is designed based on NCERT Syllabus for Class 10 Topics of Science – Chemistry , Biology and Physics

  • Each time random 25 questions will be displaced from the question bank of 500 + Questions
  • So we recommend you to retake the quiz till you have mastered all the questions

1 / 25

Identify the reducing agent in the following reactions 4NH3 + 5O2 → 4NO + 6H2O

2 / 25

Three beakers labelled as A, B and C, each containing 25 ml of water, were taken. A small amount of NaOH, anhydrous CuSO4 and NaCl were added to the beakers A, B and C respectively. It was observed that there was an increase in the temperature of the solutions contained in beakers A and B, whereas in the case of beaker C, the temperature of the solution fell. Which one of the following statement(s) is (are) correct?

  1. In beakers A and B, exothermic process has occurred.

  2. In beakers A and B, endothermic process has occurred

  3. In beaker C, exothermic process has occurred

  4. In beaker C, endothermic process has occurred.

3 / 25

Which of the following substances will not give carbon dioxide on treatment with dilute acid?

4 / 25

The pH of pure water is

5 / 25

A Metal that exists in liquid state at room temperature

6 / 25

Give the formula of the stable binary compounds that would be formed by the combination of following pair of elements: Li and O2

7 / 25

A molecule of ammonia (NH3) has:

8 / 25

Ethane is

9 / 25

The molecular formula of Ethanol

10 / 25

The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belongs to the identical group?

11 / 25

The formulae of chlorides of Eka-aluminium, the elements predicted by Mendeleev.

12 / 25

The opening and closing of the stomatal pore depends upon:

13 / 25

The rings of cartilage present in the throat ensure that the air passage

14 / 25

Which of the following statements are true for fowers?

  1. Flowers are always bisexual

  2. They are the sexual reproductive organs

  3. They are produced in all groups of plants

  4. After fertilization they give rise to fruits

15 / 25

Which among the following statements are true for sexual reproduction in fowering plants?

  1. It requires two types of gametes.

  2. Fertilisation is a compulsory event.

  3. It always results in the formation of zygote.

  4. Offsprings formed are clone

16 / 25

Which one of the following permanently marks the end of menstrual cycle in females ?

17 / 25

The first person to give scientific explanation for the mechanism of transmission of characters from parents to the offsprings.

18 / 25

A trait in an organism is infuenced by:

19 / 25

Which of the following statements is correct regarding the propagation of light of diferent colours of white light in air?

20 / 25

Why don’t planets twinkle?

21 / 25

Milk is a colloid that contains globules of fat and protein. When a beam of light is directed at a glass of milk the light is scattered. That is a great example

22 / 25

The instrument used for measuring electric current is:

23 / 25

The commercial unit of electrical energy

24 / 25

The strength of each of magnet reduces to half when it cut along its length into the equal parts magnetic field strength of a solenoid. Polarity of solenoid can be determined by:

25 / 25

A soft iron bar is introduced inside the current carrying solenoid. The magnetic field inside the solenoid:

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