MCQ 11 MarkWhich trophic level is formed by herbivores ? AFirst✓Second CThird DFourthAnswerCorrect option: B. Second View full question & answer→
MCQ 21 MarkWhich of the following are environment$-$friendly practices ? ACarrying cloth bags to put purchases in while shopping. BSwitching off unnecessary lights and fans. Cwalking to school instead of getting your mother to drop you on her scooter. ✓All of the above. AnswerCorrect option: D. All of the above. View full question & answer→
MCQ 31 MarkWhich of the following are constitute a food$-$chain ?A Grass, wheat and mango ✓Grass, goat and human CGoat, Cow and Elephant DGrass, Fish and goat AnswerCorrect option: B. Grass, goat and human View full question & answer→
MCQ 41 MarkWhich of the following are biodegradable substances ? AGrass, flowers and leather BGrass, wood and plastic CFruit$-$peels, cake and lime juice ✓Cake, wood and grass AnswerCorrect option: D. Cake, wood and grass View full question & answer→
MCQ 51 MarkAquarium is a $...........$ ecosystem. ✓Artificial BNatural CDesert DNone of them AnswerCorrect option: A. Artificial View full question & answer→
MCQ 61 MarkBreakdown of pyruvate into carbon dioxide and water to produce energy takes place in $…………..$ACytoplasm ✓Mitochondria CChlorophyll DNucleus AnswerCorrect option: B. Mitochondria View full question & answer→
MCQ 71 Mark$........$ is the first enzyme mixed with food. APepsin BCellulose ✓Salivary amylase DTrypsin AnswerCorrect option: C. Salivary amylase View full question & answer→
MCQ 81 MarkFood is moved to this spot by the movement of cilia in AFungiBAmoeba CEuglena✓Paramoecium AnswerCorrect option: D. Paramoecium View full question & answer→
MCQ 91 Mark$...........$ is essential for autotrophs. A$CO_2 $BChlorophyll CSunlight ✓All of them AnswerCorrect option: D. All of them View full question & answer→
MCQ 101 MarkWhen we blow air by mouth in the test tube containing lime water will change into milky white due to presence of which gas ? AOxygen ✓Carbon dioxide CNitrogen DHumidity AnswerCorrect option: B. Carbon dioxide View full question & answer→
MCQ 111 MarkWhich gas if flushed in the bag of chips by the chips manufacturers to prevent the chips from getting oxidised ? AOxygen ✓Nitrogen CHydrogen DHelium AnswerCorrect option: B. Nitrogen View full question & answer→
MCQ 121 MarkWhich type of reaction is the burning of coal ? ADisplacement BDouble displacement CDecomposition ✓Combination AnswerCorrect option: D. Combination View full question & answer→
MCQ 131 MarkOn healing Lead nitrate, which coloured fumes evolved $? $AYellow ✓Brown CWhite DBlack AnswerCorrect option: B. Brown View full question & answer→
MCQ 141 MarkWhich reaction is also called as precipitation reaction ? ADecomposition reaction BCombination reaction CDisplacement reaction ✓Double displacement reaction AnswerCorrect option: D. Double displacement reaction View full question & answer→
MCQ 151 Mark$\ce{Fe_{2}O_{3} + 2Al \ldots Al_{2}O_{3} + 2 Fe}$ The above reaction is an example of a, ACombination reaction BDouble displacement reaction CDecomposition reaction ✓Displacement reaction AnswerCorrect option: D. Displacement reaction View full question & answer→