User Forum

If it is possible to make a meaningful word from the second, fifth, eighth and tenth letters of the word RESIDENTIAL using each letter only once, then the last letter of the word would be your answer. If more than one such word can be formed, your answer would be 'X' and if no such word can be formed, your answer would be 'Z'.

AX
BZ
CE
DN

Boojho took an empty plastic bottle, turned it upside down and dipped its open mouth into a bucket filled with water. He then tilted the bottle slightly and made the following observations.
(i) Bubbles of air came out from the bottle.
(ii) Some water entered the bottle.
(iii) Nitrogen gas came out in the form of bubbles and oxygen got dissolved in water.
(iv) No bubbles formed, only water entered the bottle.
Which observations is / are correct?

A (i) and (ii)
B (iv) only
C (iii) and (iv)
D (i) only

In each of the following questions, a statement of Assertion is given and a corresponding statement of Reason is given just below it. Of the statements, given below, mark the correct answer as:
Assertion : Plasma membrane is selectively permeable.
Reason : Plasma membrane allows some molecules to pass through more easily than others.

A If both Assertion and Reason are true and Reason is the correct explanation of Assertion
B If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
C If Assertion is true but Reason is false
D If both Assertion and Reason are false.

Using a ruler and compasses, which of the following constructions can be made?

AA circle, when the length of its radius is known.
BThe perpendicular bisector of a line segment of the given length.
CBoth A and B
DNone of these

Compare and fill in the box with <, > or = .

A=
B>
C<
DCan't be determined

In each of the following questions, a statement of Assertion (A) is given followed by a corresponding statement of Reason(R) just below it. Of the statements, mark the correct answer as
Assertion : The function of urethra is to conduct urine from kidneys to the urinary bladder.
Reason : When the blood reaches kidneys, it contains only harmful substances which are directly sent to ureters by the kidneys.

A If both assertion and reason are true and reason is the correct explanation of assertion.
B If both assertion and reason are true but reason is not the correct explanation of assertion.
C If assertion is true but reason is false.
D If both assertion and reason are false.

Which set of substances is not used for making fibres?

A Silk, chemicals
B Yak hair, camel hair
C Husk, bones
D Flax, wool

In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:
Assertion : Rickets in children is caused by the deficiency of vitamin C.
Reason : Vitamin C is present in cod liver oil.

A If both assertion and reason are true and reason is the correct explanation of assertion.
B If both assertion and reason are true but reason is not the correct explanation of assertion.
C If assertion is true but reason is false.
D If assertion is false but reason is true.

In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:
Assertion : Lack of roughage in diet makes the stool hard and difficult to pass.
Reason : Roughage adds bulk to food and helps to get rid of undigested food.

A If both assertion and reason are true and reason is the correct explanation of assertion.
B If both assertion and reason are true but reason is not the correct explanation of assertion.
C If assertion is true but reason is false.
D If assertion is false but reason is true.

In each of the following questions, a statement of Assertion is given and a corresponding statement of Reason is given just below it. Of the statements, given below, mark the correct answer as:
Assertion : A cell membrane shows fluid behaviour.
Reason : A membrane is a mosaic of lipids and proteins.
A If both Assertion and Reason are true and Reason is the correct explanation of Assertion
B If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
C If Assertion is true but Reason is false
D If both Assertion and Reason are false.