Mcq on chemistry with answer

1. Which of the following is a noble gas?

a) Helium

b) Oxygen

c) Nitrogen

d) Carbon dioxide

Answer: a) Helium

2. The chemical formula for water is:

a) H2O

b) CO2

c) NaCl

d) CH4

Answer: a) H2O

3. Which of the following metals is most reactive?

a) Gold

b) Silver

c) Sodium

d) Copper

Answer: c) Sodium

4. The process of rusting is:

a) Oxidation

b) Reduction

c) Neutralization

d) Decomposition

Answer: a) Oxidation

5. The pH scale measures the:

a) Acidity or basicity of a solution

b) Temperature of a solution

c) Concentration of a solution

d) Solubility of a solution

Answer: a) Acidity or basicity of a solution

6. Which of the following is an acid?

a) Sodium hydroxide

b) Hydrochloric acid

c) Potassium carbonate

d) Calcium hydroxide

Answer: b) Hydrochloric acid

7. Which of the following is a base?

a) Sulfuric acid

b) Nitric acid

c) Sodium hydroxide

d) Hydrochloric acid

Answer: c) Sodium hydroxide

8. The chemical formula for carbon dioxide is:

a) CO

b) CO2

c) CH4

d) O2

Answer: b) CO2

9. The chemical formula for sodium chloride is:

a) NaCl

b) Na2O

c) NaOH

d) NaHCO3

Answer: a) NaCl

10. The chemical formula for sulfuric acid is:

a) H2SO4

b) HCl

c) HNO3

d) H2CO3

Answer: a) H2SO4

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Life is beautiful

Life is beautiful, Full of wonder and awe. From the smallest flower to the grandest mountain, There is beauty all around us. We can find beauty in nature, In the company of friends and family, And in the simple things in life. Life is a gift, And we should cherish every moment. So go out and enjoy the beauty of life, And make the most of every day. The sun shines brightly in the sky, The birds sing merrily in the trees, And the flowers bloom in the fields. All around me is beauty, And I am filled with joy. Life is beautiful, And I am grateful for every moment.

Dussehra

Dussehra is a major Hindu festival that celebrates the victory of good over evil. It is also known as Vijayadashami, which means "tenth day of victory." Dussehra is celebrated on the tenth day of the Hindu month of Ashvin, which usually falls in September or October. Dussehra is based on the story of Lord Rama's victory over the demon king Ravana in the epic Ramayana. Ravana had abducted Rama's wife, Sita, and taken her to his island kingdom of Lanka. Rama and his army fought a long and fierce battle against Ravana and his forces. In the end, Rama defeated Ravana and rescued Sita. Dussehra is a time for celebration and reflection. It is a time to celebrate the victory of good over evil, and to reflect on the importance of following the path of righteousness. Dussehra is also a time to come together as a community and to celebrate the rich culture and heritage of Hinduism. Here are some notes on how Dussehra is celebrated: People decorate their homes and businesses with flowers and other festive decorations. They visit temples and offer prayers to the gods. They participate in Ram-lila, which is a dramatic performance of the Ramayana. They burn effigies of Ravana, Meghnad (Ravana's son), and Kumbhakarna (Ravana's brother) to symbolize the victory of good over evil. They distribute sweets and gifts to their friends and family. They enjoy traditional foods and drinks. Dussehra is a time for joy, celebration, and reflection. It is a time to come together as a community and to celebrate the rich culture and heritage of Hinduism.