The greenhouse effect is a climatic condition associated with the presence of excess A. carbon (IV) oxide B. hydrogen sulphide C. nitrogen (ll) oxide D. ammonia gas Correct Answer: Option A A. carbon (IV)...Read More
Environmental pollution problems are generally more severe in countries which have A. dense population B. low birth rate C. great land mass D. limited industries Correct Answer: Option A A. dense...Read More
Which of the following is needed to produce slag during the extraction of iron in the blast furnace?
Which of the following is needed to produce slag during the extraction of iron in the blast furnace? A. Cryolite B. Limestone C. Carbon D. Sulphur Correct Answer: Option B B....Read More
Which of the following compounds reacts with sodium hydroxide to form a salt? A. CH 3CH 2COOH B. (CH3) 3COH C. CH3CH=CH 2 D. C 6H 12O 6 Correct Answer: Option A A. CH 3CH...Read More
Which of the following is the most reactive towards bromine? A. Methane B. Benzene C. Ethyne D. Hexane Correct Answer: Option C C. EthyneRead More
How many carbon atoms are present in one molecule of 2-methylpropane? A. 2 B. 3 C. 4 D. 5 Correct Answer: Option C C. 4Read More
When dilute copper (ll) chloride solution is electrolysed, the reaction at the cathode is represented by the equation
When dilute copper (ll) chloride solution is electrolysed, the reaction at the cathode is represented by the equation A. Cu → Cu2+ + 2e- B. Cu2+ + 2e- → Cu C. 40H- – 4e- → O2 + 2H2O D. 2CI- → CI2 + 2e Correct Answer:...Read More
Equal volumes of water were added to one mole of each of the following compounds. Which of them produced the largest number of ions A. Glucose B. Sodium trioxonitrate (V) C. Ethananoic acid D. Silver chloride Correct Answer:...Read More
Which of the following is not correct about oxidation number convention? The oxidation number of a/an A. element in the free state is zero B. monatomic ion is equal to its charge C. alkali meta like sodium in its compounds is +...Read More
- During blood transfusion, agglutination could be prevented if a patient having blood group O is given blood from the group?
- Which of the following terms is not associated with fingerprint and classification?
- Which of the following represents Mendel’s second law of inheritance? The factors for two pairs of contrasting characters are?
- The concept of use and disuse of parts was postulated by?
- Character which falls to express itself in the first filial generation but emerges in the second is?