Chemistry-
General
Easy
Question
Which of the following is/are correctly matched ?
- Black
- White precipitate
- Yellow precipitate
- Red precipitate
The correct answer is: Black
Related Questions to study
chemistry-
In which of the following pairs the precipitates are red and black coloured respectively and both precipitates are soluble in excess KI solution ?
In which of the following pairs the precipitates are red and black coloured respectively and both precipitates are soluble in excess KI solution ?
chemistry-General
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When chlorine (Cl2) water in excess is added to a salt solution containing chloroform, chloroform layer turns pale yellow. Salt contains :
When chlorine (Cl2) water in excess is added to a salt solution containing chloroform, chloroform layer turns pale yellow. Salt contains :
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Zinc pieces are added to acidified solution of SO32 – . Gas liberated can :
Zinc pieces are added to acidified solution of SO32 – . Gas liberated can :
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Statement - 1 : Silica is added as a flux in reverberatory furnace, in the extraction of copper from copper pyrites.
Statement - 2 : Silica decreases the melting point of the ore and remove the impurity of lead sulphide as PbSiO3 .
Statement - 1 : Silica is added as a flux in reverberatory furnace, in the extraction of copper from copper pyrites.
Statement - 2 : Silica decreases the melting point of the ore and remove the impurity of lead sulphide as PbSiO3 .
chemistry-General
physics-
Which of the following wiring diagrams could be used to experimentally determine R using ohm's law? Assume an ideal voltmeter and an ideal ammeter.
Which of the following wiring diagrams could be used to experimentally determine R using ohm's law? Assume an ideal voltmeter and an ideal ammeter.
physics-General
physics-
In the arrangement shown in figure when the switch S2 is open, the galvanometer shows no deflection for l = L/2. When the switch S2 is closed, the galvanometer shows no deflection for l = 5L 12. The internal resistance (r) of 6 V cell, and the emf E of the other battery are respectively
In the arrangement shown in figure when the switch S2 is open, the galvanometer shows no deflection for l = L/2. When the switch S2 is closed, the galvanometer shows no deflection for l = 5L 12. The internal resistance (r) of 6 V cell, and the emf E of the other battery are respectively
physics-General
physics-
A battery of emf = 12 V is connected across a 4m long uniform wire having resistance 4 /m. The cells of small emfs = 2V and = 4V having internal resistance 2 and 6 respectively, are connected as shown in the figure. If galvanometer shows no deflection at the point N, the distance of point N from the point A is equal to
A battery of emf = 12 V is connected across a 4m long uniform wire having resistance 4 /m. The cells of small emfs = 2V and = 4V having internal resistance 2 and 6 respectively, are connected as shown in the figure. If galvanometer shows no deflection at the point N, the distance of point N from the point A is equal to
physics-General
physics-
In the given potentiometer circuit length of the wire AB is 3 m and resistance is R = 4.5 . The length AC for no deflection in galvanometer is
In the given potentiometer circuit length of the wire AB is 3 m and resistance is R = 4.5 . The length AC for no deflection in galvanometer is
physics-General
physics-
An ammeter A of finite resistance, and a resistor R are joined in series to an ideal cell C. A potentiometer P is joined in parallel to R. The ammeter reading is I0 and the potentiometer reading is V0. P is now replaced by a voltmeter of finite resistance. The ammeter reading now is I and the voltmeter reading is V
An ammeter A of finite resistance, and a resistor R are joined in series to an ideal cell C. A potentiometer P is joined in parallel to R. The ammeter reading is I0 and the potentiometer reading is V0. P is now replaced by a voltmeter of finite resistance. The ammeter reading now is I and the voltmeter reading is V
physics-General
physics-
In the figure, the potentiometer wire AB of length L and resistance 9r is joined to the cell D of emf e and internal resistance r. The cell C’s emf is e/2 and its internal resistance is 2r. The galvanometer G will show no deflection when the length AJ is
In the figure, the potentiometer wire AB of length L and resistance 9r is joined to the cell D of emf e and internal resistance r. The cell C’s emf is e/2 and its internal resistance is 2r. The galvanometer G will show no deflection when the length AJ is
physics-General
physics-
The length of a potentiometer wire is l. A cell of emf E is balanced at a length l/3 from the positive end of the wire. If the length of the wire is increased by l/2. At what distance will the same cell give a balance point
The length of a potentiometer wire is l. A cell of emf E is balanced at a length l/3 from the positive end of the wire. If the length of the wire is increased by l/2. At what distance will the same cell give a balance point
physics-General
physics-
The figure shows a metre-bridge circuit, with AB = 100 cm, X = 12 and R = 18 , and the jockey J in the position of balance. If R is now made 8 , through what distance will J have to be moved to obtain balance?
The figure shows a metre-bridge circuit, with AB = 100 cm, X = 12 and R = 18 , and the jockey J in the position of balance. If R is now made 8 , through what distance will J have to be moved to obtain balance?
physics-General
Physics-
A 6 V battery of negligible internal resistance is connected across a uniform wire of length 1 m. The positive terminal of another battery of emf 4V and internal resistance 1 is joined to the point A as shown in figure. The ammeter shows zero deflection when the jockey touches the wire at the point C. The AC is equal to
A 6 V battery of negligible internal resistance is connected across a uniform wire of length 1 m. The positive terminal of another battery of emf 4V and internal resistance 1 is joined to the point A as shown in figure. The ammeter shows zero deflection when the jockey touches the wire at the point C. The AC is equal to
Physics-General
physics-
In the figure shown for gives values of R1 and R2 the balance point for Jockey is at 40 cm from A. When R2 is shunted by a resistance of 10 , balance shifts to 50 cm. R1 and R2 are (AB = 1 m):
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physics-General
physics-
A Wheatstone's bridge is balanced with a resistance of 625 in the third arm, where P, Q and S are in the 1st, 2nd and 4th arm respectively. If P and Q are interchanged, the resistance in the third arm has to be increased by 51 to secure balance. The unknown resistance in the fourth arm i
A Wheatstone's bridge is balanced with a resistance of 625 in the third arm, where P, Q and S are in the 1st, 2nd and 4th arm respectively. If P and Q are interchanged, the resistance in the third arm has to be increased by 51 to secure balance. The unknown resistance in the fourth arm i
physics-General