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- Question
PAS is a drug used in the treatment of
Options- A. tuberculosis
- B. Cancer
- C. typhoid
- D. malaria
- Correct Answer
- tuberculosis
ExplanationPara-amino salicyclic acid (PAS) is used in the treatment of Tuberculosis.
- 1. Water always contains hydrogen and oxygen in the ratio 1:8 by weight.This is in accordance with the
Options- A. Law of Multiple Proportions
- B. Law of Definite Proportion
- C. Law of Conservation of mass
- D. Law of Reciprocal Proportions Discuss
- 2. Which of the following is the lightest metal?
Options- A. Lithium
- B. Silver
- C. Mercury
- D. Lead Discuss
- 3. A substance that cannot be broken down into simpler substances
Options- A. Heterogenous mixure
- B. Compound
- C. Homogenous mixture
- D. Element Discuss
- 4. Which of the following elements has the lowest melting point?
Options- A. Bromine
- B. Zinc
- C. Lead
- D. Calcium Discuss
- 5. What is the base of the Octal Numeral System?
Options- A. 8
- B. 16
- C. 32
- D. 64 Discuss
- 6. Which of the following is an element
Options- A. alumina
- B. brass
- C. graphite
- D. silicon Discuss
- 7. When the nucleus of Uranium is bombarded with neutrons, it breaks up into two nuclei of nearly equal mass. this process is called
Options- A. nuclear fission
- B. nuclear fusion
- C. physical change
- D. artificial radioactivity Discuss
- 8. Metal present in chocolate wrappers is
Options- A. Aluminium
- B. Haemoglobin
- C. Chalk
- D. Chlorophyll Discuss
- 9. Glass is a.........mixture of metallic...........
Options- A. homogenous, sulphates
- B. homogenous, silicates
- C. heterogenous, carbonates
- D. heterogenous, nitrates Discuss
- 10. Is boiling water a chemical change? Discuss
Chemistry problems
Search Results
Correct Answer: Law of Definite Proportion
Explanation:
The Law of Definite Proportion states that the same compound, wherever found or however made, always contains the same elements combined together in the same fixede ratio by weight.
Correct Answer: Lithium
Correct Answer: Element
Explanation:
A substance that cannot be decomposed (broken down) into simpler substances by ordinary chemical means.
Examples: gold, iron, carbon, hydrogen, oxygen, nitrogen.
Material composed of only one kind of matter throughout (same atoms or same molecules).
Correct Answer: Bromine
Correct Answer: 8
Correct Answer: silicon
Correct Answer: nuclear fission
Correct Answer: Aluminium
Correct Answer: homogenous, silicates
Correct Answer: No Boiling water is not a chemical change Because in this process it doesn't loss its properties It just changes its state ie, from liquid state to gaseous Hence, Boiling water is a Physiacl change and not a chemical change
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