Question

28) The device used for producing current is called a
a. voltmeter b. ammeter c. galvanometer
d. generator
29) A student arranges elements in increasing order of non-metallic character. W
of the order?
a. B < N <F
b. P <Si <S C. CNCC dcera
30) The correct increasing order of reactivity of alkaline earth metals with water
a. Be< Mg < Ca < Sr < Ba
C. Ba < Mg < Ca<Sr < Be
b. Be< Mg < Ca < Ba < Sr
d. Be < Ca < Mg <Sr < Ba
2. Answer the following.
1) Write the merits of Mendeleev's periodic table giving examples.
2) Draw a neat labelled diagram and explain.
What is Solenoid? Compare the magnetic field produced by a Solenoid with the
magnetic field of a bar magnet.​

Answer 1

Answer:

28. d

29.b

Answer is yes