MODEL PAPER 10 — Science STD 10 — Question

Which of the following causes an imbalance in the environment?

The steps involved in observing a slide under a microscope are given below. They may not be in proper sequence.

1. Focus the object under high power of the microscope.
2. Place the slide on the stage of the microscope.
3. Arrange the mirror to reflect maximum light to the slide.
4. Focus the object under low power of the microscope.

The proper sequence of steps is:

Electric current is to be passed from one body to another. For this purpose the two bodies must be joined by :

The axis of earth's magnetic field is inclined with the geographical axis at an angle of about:

The pH of the gastric juices released during digestion is:

IUPAC names of a few esters are given below:
i. Ethyl propanoate
ii. Propyl methanoate
iii. Methyl butanoate
iv. Ethyl butanoate
The ester(s) which contain(s) ten hydrogen atoms per molecule is/are

The real image formed by a concave mirror is larger than the object when object is :

Any change in the environment to which an organism responds is called :

The device used for measuring potential difference is known as: