Question

d) An atom has equal number of electrons, protons and ncutrons
2. Isotopes of an element do not have
a) Same element.
b) Same physical properties.
c) Same chemical properties.
d) Same electrical charge on the nuc
3. The molecular
formula of potassium nitrate is
a) KNO3
b) KNO2
c) KNO
d) Ko
4. Find out the correct sentences
a) Enzymes packed in lysosomes are made by rough endoplasmic reticulum
b) Rough undoplasmic reliculum and smooth endoplasmic reticulum produce lipid and
c) Endoplasmic reticulum is related with the destruction of plasma membrunc
d) Nucleoid is present inside the nucleus of'an cukaryotic cell
5. Living cells were discovered by
a) Robert hooke: b) lccuwenhoek
c) Purkinje
d) Row
6. The dead element present in the phloem is
al Companion cells b) Phloem Mbres
c) Phloem parenchyma
d) SIC
7. Name the tissue responsible for the movement in our body.
8. Identify the clements from the following substances,
Sulphur, brine, hydrochlonc acid, water, neon, paper, sugar.
9. Write the distribution of electrons in silicon atom
SECTION-B
10. Describe any two properties of colloid and suspension.
11. Which has more number of atoms, 100 grams of sodium or 100 grams of iron
(given, atomic mass of sodium23u, Fe=56u)
SECTION-C
12. The atomic number of sodium, aluminium and Oxygen are 11.13 and 8 respectively​

Answer 1

Explanation:

2. b)

3. a)

5. b)

7. muscle tissue