MCQ
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Aluminum oxide and zinc oxide are acidic in nature.
Reason : Amphoteric nature means that substances have both acidic and basic character.
  • A
    Both $A$ and $R$ are true, and $R$ is correct explanation of the assertion.
  • B
    Both $A$ and $R$ are true, but $R$ is not the correct explanation of the assertion.
  • C
    $A$ is true, but $R$ is false.
  • $A$ is false, but $R$ is true.

Answer

Correct option: D.
$A$ is false, but $R$ is true.
Aluminum and zinc oxides are amphoteric in nature.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Assertion (A): If the lions are removed from a food chain it will not affect the food chain, however if the plants are removed from a food chain it will disturb the ecosystem.
Reason (R): Plants are producers who can make food using sunlight, while lions are consumers.
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Trachea does not collapse, when there is no air in it.
Reason : Trachea is supported by cartilage.
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : A bird perches on a high $-$ power line and nothing happens to the bird.
Reason : The circuit is incomplete for the bird sitting on high-power line.
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R).$ Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Atomic radius in general decreases along a period.
Reason : In a period, effective nuclear charge decreases.
Assertion (A): Each human trait is influenced by both paternal and maternal DNA.
Reason (R): As compared to the father, the mother contributes more amount of genetic material to the child.
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Decomposers help in recycling of nutrients between living and non $-$ living components of ecosystem.
Reason : Decomposers help in decomposing dead bodies of organisms and return various nutrient elements to their source viz soil, water and air.
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : ln humans, male $($or father$)$ is responsible for sex of the baby which is born.
Reason : $Y$ chromosomes are present in only male gametes or sperms.
In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as :
Assertion : Larynx passes air to the pharynx.
Reason : Pharynx produces sound.
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R).$ Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Atomic mass of certain elements are expressed in fraction, taking in account the availability of its various isotopes.
Reason : Isotopes of an element have the same atomic mass but different atomic number.
Assertion (A): Offsprings produced by asexual reproduction are genetically similar to the parents.
Reason (R): Asexual reproduction involves a single parent.