Question : An acid is a substance which:

I. is sour.

II. turns red litmus paper into blue.

Option 1: Only I is correct

Option 2: Only II is correct

Option 3: Both I and II

Option 4: None of these is correct.

Question : Which among the following is an incorrect pair?

Natural source    Acid

I. Vinegar     1. Acetic acid

II. Curd        2. Lactic acid

III. Tamarind     3. Citric acid

Option 1: I and II

Option 2: II and III

Option 3: Only II

Option 4: Only III

Question : Select the option that expresses the given sentence in passive voice.
Lemon tastes sour.

Option 1: Lemon has been tasted sour.

Option 2: Lemon is tasted sour.

Option 3: Lemon is sour when it is tasted.

Option 4: Lemon has been sour when tasted.

Question : Directions: In the following question below, some statements are followed by some conclusions. Taking the given statements to be true, even if they seem to be at variance from commonly known facts, read all the conclusions and then decide which of the given conclusions logically follows from the given statements.
Statements:
I. Some red are blue.
II. Some blue are plates.
Conclusions:
I. Some red are plates.
II. Some plates are red.
III. Some plates are blue.

Option 1: Only I and II

Option 2: Only II and III

Option 3: Only III

Option 4: No conclusion follows

Question : Directions: Three statements are given, followed by four conclusions numbered I, II, III, and IV. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements.
Statements:
No blue is red.
Some green are red.
All yellow is green.
Conclusions:
I. Some yellow are red.
II. No yellow is red.
III. Some green are blue.
IV. No green is blue.

Option 1: Only conclusions I and IV follow

Option 2: Only conclusions I and II follow

Option 3: Only conclusions III and IV follow

Option 4: None of the conclusions follow

Question : Alum is made by dissolving bauxite in:

Option 1: Phosphoric acid

Option 2: Citric acid

Option 3: Boric acid

Option 4: Sulphuric acid