What is incorrect about the given picture?
(a) Drinking water is being used to take bath
(b) Kitchen utensils are being used for bath
(c) Child is taking bath in the bathroom
(d) Both a and b
child is taking bathe in the kitchen
Which of the following statements are incorrect?
I. Reactivity of Al decreases if it is dipped in nitric acid.
II. Carbon can reduce the oxides of Na and Mg.
III. NaCl is a good conductor of electricity in solid state.
IV. Metals like K, Ca and Mg are always found in free state in nature.
A I, II and III only
B II, III and IV only
C I and III only
D II and III only
common salt can never conduct electricity in solid state
Refer the given figure, what is the total length of "Double folded Ribbon"?
Which of the following statements regarding pinhole camera is/are not correct?
(i) Pinhole camera forms virtual image
(ii) Principle of image formation in pinhole camera is rectilinear propagation of light.
(iii) Pinhole in a pinhole camera acts as the lens.
B(i) and (ii)
C(ii) and (iii)
D(i), (ii), and (iii)
Observe the given experimental set-up carefully.
Which of the following could be the possible observation and inference drawn?
A The solution becomes blue-green due to formation of copper oxide, P is acidic.
B The solution becomes blue-green due to formation of copper chloride, P is basic.
C The solution becomes white due to formation of calcium hydroxide, P is basic.
D The solution becomes white due to formation of calcium oxide, P is acidic.
the correct answer should be (b) because copper cant displace h2 from HCl