Practice free NEET NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Which of the following reptiles exhibits a four-chambered heart?
The text explicitly states: 'Heart is usually three-chambered, but four-chambered in crocodiles.'
Regarding the skin of reptiles, which statement is correct?
The NCERT states: 'Their body is covered by dry and cornified skin, epidermal scales or scutes.'
Which of these processes is characteristic of snakes and lizards among reptiles?
The text mentions: 'Snakes and lizards shed their scales as skin cast.'
If present, the number of pairs of limbs in reptiles is typically:
The NCERT states: 'Limbs, when present, are two pairs.'
Development in Reptilia is described as:
The provided text indicates: 'They are oviparous and development is direct.'
Which of the following is a poisonous snake mentioned in the context?
The NCERT text lists 'Poisonous snakes – Naja (Cobra), Bangarus (Krait), Vipera (Viper).'
Reptiles are grouped under which superclass within Vertebrata?
The summary states: 'Classes, Amphibia, Reptilia, Aves and Mammalia have two pairs of limbs and are thus grouped under Tetrapoda.'
When an AC voltage $v = v_m \sin(\omega t)$ is applied across a capacitor, the instantaneous current $i$ in the circuit is given by:
From the provided context, specifically Equation 7.16, for an AC voltage applied to a capacitor, the current is given by $i = i_m \sin(\omega t + \pi/2)$. This indicates that the current leads the voltage by a phase of $\pi/2$ (or 90 degrees).
Capacitive reactance ($X_C$) limits the amplitude of current in a purely capacitive AC circuit. Which of the following statements about capacitive reactance is FALSE?
As per the context, 'It (capacitive reactance) is inversely proportional to the frequency and the capacitance.' (page 185) and Equation 7.17 states $X_C = 1/\omega C$. Therefore, it is inversely proportional to capacitance, not directly.
In a purely capacitive AC circuit, what is the phase relationship between the instantaneous voltage across the capacitor and the instantaneous current flowing through it?
The context states, 'A comparison of Eq. (7.16) with the equation of source voltage, Eq. (7.1) shows that the current is $\pi/2$ ahead of voltage.' This means the current leads the voltage by $\pi/2$ or 90 degrees.
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.