1
MHT CET (PCB) 2024 22th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

Choose the correct statement(s) with respect to Down's syndrome

i. Down's syndrome results from non-disjunction of $21^{\text {st }}$ chromosome during gamete formation.

ii. Down's syndrome is a sex chromosomal disorder observed in immature mothers who are below the age of 18 .

iii. These patients have mild mental retardation, poor skeletal development, flat hands, stubby fingers and palms are broader.

iv. The have 44 A with XO type of karyotype.

v. The risk of giving birth to a Down Syndrome child is more in mothers who are over 45 years of age.

A
ii and iv only
B
i, iii and v only
C
i and ii only
D
only V
2
MHT CET (PCB) 2024 22th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

What is the horizontal distribution of different species occupying levels on land or in water called?

A
Stratification
B
Niche
C
Ecosystem
D
Zonation
3
MHT CET (PCB) 2024 22th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

Identify the element having highest value of first ionization enthalpy.

A
Se
B
Br
C
Xe
D
Ar
4
MHT CET (PCB) 2024 22th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

One mole of a perfect gas expands isothermally and reversibly from $10 \mathrm{dm}^3$ to $20 \mathrm{dm}^3$ at 300 K . Find $\Delta \mathrm{U}, \mathrm{q}$ and work done respectively in the process. $\left(\mathrm{R}=8.3 \times 10^{-3} \mathrm{~kJ} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\right)$

A
$0.0 \mathrm{~kJ}, 1.726 \mathrm{~kJ},-1.726 \mathrm{~kJ}$
B
$0.0 \mathrm{~kJ},-17.48 \mathrm{~kJ},-17.48 \mathrm{~kJ}$
C
$-1.726 \mathrm{~kJ}, 0 \mathrm{~kJ}, 1.726 \mathrm{k}$
D
$0.0 \mathrm{~kJ}, 21.84 \mathrm{~kJ},-21.84 \mathrm{~kJ}$