NTA JEE Main 8th January 2020 Shift 1

The strength of an aqueous NaOH solution is most accurately determined by titrating: (Note: consider that an appropriate indicator is used)

When gypsum is heated to 393K, it forms:

Arrange the following compounds in increasing order of C-OH bond length: methanol, phenol, p-ethoxyphenol

A flask contains a mixture of isohexane and 3-methylpentane. One of the liquids boils at 63$$^\circ$$C while the other boils at 60$$^\circ$$C. What is the best way to separate the two liquids and which one will be distilled out first?

Among the gases (a) - (e), the gases that cause greenhouse effect are:
(a) CO$$_2$$
(b) H$$_2$$O
(c) CFCs
(d) O$$_2$$
(e) O$$_3$$

A graph of vapour pressure and temperature for three different liquids X, Y and Z is shown below:

The following inferences are made:
(A) X has higher intermolecular interactions compared to Y.
(B) X has lower intermolecular interactions compared to Y.
(C) Z has lower intermolecular interactions compared to Y.
The correct inferences is/are:

The rate of a certain biochemical reaction at physiological temperature (T) occurs $$10^6$$ times faster with enzyme than without. The change in the activation energy upon adding enzyme is:

As per Hardy-Schulze formulation, the flocculation values of the following for ferric hydroxide sol are in the order:

The number of bonds between sulphur and oxygen atoms in S$$_2$$O$$_8^{2-}$$ and the number of bonds between sulphur and sulphur atoms in rhombic sulphur, respectively are:

The complex that can show fac- and mer-isomers is: