There are two heaters \(A\) and \(B.\) The heater \(A\) takes time \(t_1\) to boil a given quantity of water, while \(B\) takes time \(t_2\) to boil the same quantity of water across the same supply voltage. If the two heaters are connected in series, the time taken by this combination to boil the same quantity of water will be:
1.
\(\large\dfrac{t_1t_2}{t_1+t_2}\)
2.
\(t_1+t_2\)
3.
\({\large\dfrac12}(t_1+t_2)\)
4.
\(\large\dfrac{t_1t_2}{2(t_1+t_2)}\)
Subtopic: Heating Effects of Current |
61%
From NCERT
NEET - 2024
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4.74 g of an inorganic compound contains 0.39g of K, 0.27 g of Al, 1.92 g of \(\mathrm{SO_4}\) radicals and 2.16 g of water. If molar mass of the compound is \(948 \mathrm{~g} \mathrm{~mol}^{-1},\) the molecular formula of the inorganic compound is:
| 1. | \(\mathrm{{KAl}({SO}_4)_2 \cdot 12 {H}_2 {O}}\) |
| 2. | \(\mathrm{{K}_2 {Al}_2({SO}_4)_6 \cdot 12 {H}_2 {O}}\) |
| 3. | \(\mathrm{{K}_2 {SO}_4 \cdot {Al}_2({SO}_4)_3 \cdot24 {H}_2 {O}}\) |
| 4. | \(\mathrm{{K}_2 {SO}_6 \cdot {Al}_2({SO}_4)_3 \cdot12 {H}_2 {O}}\) |
Subtopic: Empirical & Molecular Formula |
59%
From NCERT
NEET - 2024
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The following can be found as a zwitter ion:
| 1. | Fatty acid | 2. | Monosaccharide |
| 3. | Amino acid | 4. | Nucleic acid |
Subtopic: Element Analysis | Amino Acids |
88%
From NCERT
NEET - 2024
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Which of the following is NOT an autosomal recessive disorder?
1. Sickle cell anemia
2. Phenylketonuria
3. Haemophilia
4. Thalassemia
1. Sickle cell anemia
2. Phenylketonuria
3. Haemophilia
4. Thalassemia
Subtopic: Mendelian Disorders | Mendelian Disorders: Hemophilia |
80%
From NCERT
NEET - 2024
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The method used for quantitative estimation of halogens is:
1. Dumas method
2. Carius method
3. Kjeldahl's method
4. Combustion method
1. Dumas method
2. Carius method
3. Kjeldahl's method
4. Combustion method
Subtopic: Qualitative Analysis of Organic Compounds |
73%
From NCERT
NEET - 2024
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If \(T_1,T_2,T_3,T_4\) and \(T_5\) represent the tension in the string of a simple pendulum when the bob is at the left extreme, right extreme, mean, any intermediate left and any intermediate right positions, respectively. Then, which of the following relations are correct?
Choose the most appropriate answer from the options given below:
| (A) | \(T_1=T_2\) | (B) | \(T_3>T_2\) |
| (C) | \(T_4>T_3\) | (D) | \(T_3=T_4\) |
| (E) | \(T_5>T_2\) | ||
| 1. | (A), (B) and (C) only | 2. | (B), (C) and (D) only |
| 3. | (A), (B) and (E) only | 4. | (C), (D) and (E) only |
Subtopic: Angular SHM |
68%
From NCERT
NEET - 2024
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Subtopic: Cell Division: Mitosis (Karyokinesis) | Cell Cycle: Meiosis I |
78%
From NCERT
NEET - 2024
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A conducting circular loop of face area \(2.5 \times 10^{-3}~\text{m}^2\) is placed perpendicular to a magnetic field which varies as \(B=0.5~\text{sin}(100 \pi t)~\text{T}\). The magnitude of induced EMF at time \(t= 0~\text{s}\) is:
1. \(0.125 \pi~ \text{mV}\)
2. \(125 \pi ~\text{mV}\)
3. \(125 \pi~\text{V}\)
4. \(12.5 \pi~\text{mV}\)
1. \(0.125 \pi~ \text{mV}\)
2. \(125 \pi ~\text{mV}\)
3. \(125 \pi~\text{V}\)
4. \(12.5 \pi~\text{mV}\)
Subtopic: Faraday's Law & Lenz Law |
68%
From NCERT
NEET - 2024
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Which of the following represents the female gametophyte?
1. Ovule
2. Embryo sac
3. Nucellus
4. Endosperm
1. Ovule
2. Embryo sac
3. Nucellus
4. Endosperm
Subtopic: Pistil: Ovule |
77%
From NCERT
NEET - 2024
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Molar mass of a compound \(\text{(X)}\) whose \(2.6 \mathrm{~mol}\) weighs \(312 \mathrm{~g}\) is:
| 1. | \(312 \mathrm{~g} \mathrm{~mol}^{-1}\) | 2. | \(120 \mathrm{~g} \mathrm{~mol}^{-1}\) |
| 3. | \(60 \mathrm{~g} \mathrm{~mol}^{-1}\) | 4. | \(811.2 \mathrm{~g} \mathrm{~mol}^{-1}\) |
Subtopic: Empirical & Molecular Formula |
85%
From NCERT
NEET - 2024
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