Latest Posts

Formic acid and acetic acid are distinguished by (1) NaHCO3 (2) FeCl3 (3) Victor Mayer test (4) Tollen’s reagent

Answer:(4) Tollen’s reagent The aldehyde group is present in formic acid. It, like other aldehydes, reduces Tollen’s reagent to silver... View Article

The earth behaves as a magnet with magnetic field pointing approximately from the geographic (1) North to South (2) South to North (3) East to West (4) West to East

Answer: (2) South to North At the North pole and the South pole, a bar magnet will point vertically because... View Article

The increasing order of reducing power of the halogen acids is (1) HF < HCI < HBr < HI (2) HI < HBr < HCI < HF (3) HBr < HCI < HF < HI (4) HCI < HBr < HF < HI

Answer: (1) HF < HCI < HBr < HI As the size of the halogen atom increases, the binding strength... View Article

Diagonal relationship is not shown by (1) Li and Mg (2) Be and Al (3) B and Si (4) C and P

Answer: (4) C and P A diagonal relationship in S block elements exists between adjacent elements which are located in... View Article

The internal energy of an ideal gas depends upon (1) only its pressure (2) only its volume (3) only its temperature (4) its pressure and volume

Answer: (3) only its temperature In ideal gases, intermolecular forces are supposed to be absent, and collisions are entirely elastic.... View Article

For what value of x the matrix A is singular

\(\begin{array}{l}\mathbf{\begin{bmatrix} 1+x & 7 \\ 3-x & 8 \end{bmatrix}}\end{array} \) Answer: A matrix is an ordered arrangement of rectangular arrays... View Article

A water pump driven by petrol raises water at a rate of 0.5m³/minute from a depth of 30m. If the pump is 70% efficient, then power developed by the engine is (1) 1750W (2) 2450W (3) 3500W (4) None of these

Answer: (3) 3500W η = Po/Pi Where η = Efficiency of the engine Po = Output power Pi = Input... View Article

What is the LCM of 24 and 90?

Answer: In Mathematics, LCM(Least Common Multiple) of any two is the value which is evenly divisible by the two given... View Article

The electric flux from a cube of edge l is ϕ. If an edge of the cube is made 2l and the charge enclosed is halved, its value will be (1) 4ϕ (2) 2ϕ (3) ϕ/2 (4) ϕ

The electric flux from a cube of edge l is ϕ. If an edge of the cube is made 2l... View Article

The angular shape of ozone molecule (O₃) consists of (1) sigma and 2 pi bonds (2) sigma and 2 pi bonds (3) 1 sigma and 1 pi bonds (4) 2 sigma and 1 pi bonds

Answer: (4) 2 sigma and 1 pi bonds Ozone (O3) an unstable, blue, diamagnetic gas with a characteristic pungent odor,... View Article

The average weight of 8 persons increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person (1) 76Kg (2) 85Kg (3) 76.5Kg (4) Data inadequate

Answer: (2) 85Kg Given: Total number of person = 8 Increased in average weight = 2.5 kg Total weight increased... View Article

With rise in temperature the electrical conductivity of intrinsic semiconductor: (1) Increases (2) Decreases (3) First increases and then decreases (4) First decreases and then increases

With rise in temperature the electrical conductivity of intrinsic semiconductor: (1) Increases (2) Decreases (3) First increases and then decreases... View Article

Water falls from a tap, down the streamline (1) Area decreases (2) Area increases (3) Velocity remains same (4) Area remains same

Answer: (1) Area decreases As per the equation of continuity Constant = Area (A) × Velocity(V) ∴ When velocity increases,... View Article

How to do long division?

Answer: Long Division is a method for dividing large numbers that divides the task into numerous phases that must be... View Article

A potentiometer consists of a wire of length 4m and resistance 10Ω. It is connected to a cell of EMF 3V. The potential gradient of wire is (1) 0.75 V/m (2) 2 V/m (3) 6 V/m (4) 10 V/m

A potentiometer consists of a wire of length 4m and resistance 10Ω. It is connected to a cell of EMF... View Article

«
1
…
794
795
796
797
798
…
5,472
»