The correct order of increasing boiling points of the following compounds is: Pentan-1-ol, n-Butane, Pentanal, Ethoxyethane:

In a coordination entity the central atoms or ions are referred to as:

Match List-I and List-II

List-I	List-II
A. Phenol + CH3Cl is presence of anhy AlCl 3	I. Salicylaldehyde
B. Phenol + Br2 water	II. 2,4,6 -Tribromophenol
C. Phenol + CH3Cl/OH	III. Salicylic acid
D. Phenol + CO2 \(/ NaOH\)	IV. p-cresol

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Elements of group-15, 16 and 17 form compounds with hydrogen with general formula MH3, \(H 2 M\) and HX (called hydrogen halides). Stability of these hydrides, along with M-H bond strength and basic nature decreases down the group. Boiling point of these hydrides mainly depends on the strength of their inter molecular forces.
Bond angle (HMH) among hydrides of group-16 decreases down the group because:

Match List-I with List-II

List-I (Types of solutions)	List-II (Examples)
(A) Gas in Gas solution	(I) Oxygen dissolved in water
(B) Gas in Liquid solution	(II) Copper dissolved in gold
(C) Liquid in Solid solution	(III) Mixture of oxygen and nitrogen gases
(D) Solid in Solid solution	(IV) Amalgam of mercury with sodium

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Match List I with List II

LIST I	LIST II
A. Solvent used in perfumes	I. Phenol
B. Starting material for picric acid	II. Glycerol
C. Wood Spirit	III. Methanol
D. By product of soap industry used in cosmetics	IV. Ethanol

Choose the correct answer:

Identify the order of the two reactions whose rate constants are given below:
(i)k = 2.3 × 10^-5 L mol^-1 s^-1
(ii)k = 3 x 10^-4s^-1

Match List I with List II

LIST I	LIST II
A. Down's syndrome	I. 44+XXY
B. Thalassemia	II. Autosomal recessive trait
C. Klinefelter's syndrome	III. 44 + XO
D. Turner's Syndrome	IV. 45+XY/XX

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Identify the sequence of bases of \(m-RNA\) molecule synthesised on the given strand of \(DNA\) AGCGATTAC.

The bottom of a container is a 6 cm thick glass slab \((\mu=1.5)\).
The container contains a thick layer of water ( \(\mu_w=1.33\) ), 4 cm on top of the glass.
What is the apparent position of a scratch on the outer surface of the bottom of the glass slab
when viewed through the container?

Read the passage carefully and answer the questions based on the passage:
Pollen pistil interaction involves all events from the landing of pollen grains on the stigma until the pollen tube enters the embryo sac (when the pollen is compatible). When a pollen tube grows through the style and enters into the ovules, it finally discharges two male gametes in one of the synergids. Syngamy and triple fusion are two fusion events occur in angiosperms. Thus, angiosperms exhibit double fertilization. The products of these fusions are the diploid zygote and triploid primary endosperm nucleus. Zygote develops into embryo and primary endosperm cell forms the endosperm tissue. The developing embryo passes through different stages before maturation.
If there are 38 chromosomes in the zygote, how many chromosomes will be there in its haploid egg cell?

The rupturing of RBCs is associated with release of a toxic substance known as:-

The electron in a hydrogen atom rises from its n = 1 state to n = 4 state by absorbing energy. The energy of the electron in the n = 1 state is -13.6 eV. How much energy is absorbed by the electron in transition?