JEE Main 2023 · 8 Apr 2023 Shift 2

Which of the following have same number of significant figures?

1. A0.00253
2. B1.0003
3. C15.0
4. D163 Choose the correct answer from the options given below

Arrange the following gases in increasing order of van der Waals constant 'a'

1. AAr
2. BCH₄
3. CH₂O
4. DC₆H₆ Choose the correct option from the following.

In Hall - Heroult process, the following is used for reducing Al₂O₃ :-

1. ANa₃AlF₆
2. BGraphite
3. CMagnesium
4. DCaF₂

Which of the following can reduce decomposition of H₂O₂ on exposure to light

1. AAlkali
2. BUrea
3. CDust
4. DGlass containers

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R Assertion A : Sodium is about 30 times as abundant as potassium in the oceans. Reason R : Potassium is bigger in size than sodium. In the light of the above statements, choose the correct answer from the options given below

1. ABoth A and R are true and R is the correct explanation of A
2. BBoth A and R are true but R is NOT the correct explanation of A
3. CA is true but R is false
4. DA is false but R is true

For a good quality cement, the ratio of lime to the total of the oxides of Si, Al and Fe should be as close as to

1. A1
2. B2
3. C3
4. D4

The descending order of acidity for the following carboxylic acid is-

1. ACH₃COOH
2. BF₃C–COOH
3. CClCH₂–COOH
4. DFCH₂–COOH
5. EBrCH₂–COOH Choose the correct answer from the options given below:

The statement/s which are true about antagonists from the following is/are:

1. AThey bind to the receptor site.
2. BGet transferred inside the cell for their action.
3. CInhibit the natural communication of the body.
4. DMimic the natural messenger. Choose the correct answer from the options given below: