Question 1 :
Which of the following elements will produce a sound on striking a hard surface?
Question 2 :
Which of the following elements has two electrons in the outermost shell but is a non–metal?
Question 3 :
Which of the following salts contains water of crystallization?
I. Gypsum
II. Epsom salt
III. Blue vitriol
IV. Glauber’s salt
Question 4 :
Name the substance which on treatment with chlorine yields bleaching powder.
Question 5 :
Name an indicator which indicates the various levels of hydrogen ion concentration.
Question 8 :
Which of the following salt is used in lab to seal air gaps in apparatus so as to make the air tight arrangement?
Question 16 :
The power of a lens is - 2.5 D, then its focal length is …………..m.
Question 17 :
Which colour in the visible region has the greatest speed in a optically denser medium?
Question 18 :
Where will the image be formed if the object is at the focus of the concave mirror?
Question 19 :
Match the following with correct response.
(1) Insects
(2) Earthworm
(3) Fishes
(4) Mammals
(A) Gills
(B) Trachea
(C) Lungs
(D) Skin
Question 20 :
Match the following with correct response.
(1) Saliva
(2) Gastric juice
(3) Pancreatic juice
(4) Succuss entricus
(A) sucrose
(B) Pepsin
(C) Amylase
(D) Trypsin
Question 21 :
Match the following with correct response.
(1) Epiglottis
(2) Platelets
(3) Instrument used to check normal activities of heart
(4) Instrument used to measure blood pressure of human heart
(A) Blood coagulation
(B) Sphygmomanometer
(C) Electro cardiograph
(D) Covers wind pipe while swallowing food
Question 22 :
Osmoregulation is the process
A. To maintain right amount of water
B. To maintain proper ionic balance
C. To maintain temperature of body
D. To maintain glucose level of blood
Question 23 :
If the solution of lead (II) nitrate and potassium iodide are mixed together. What is the colour of the precipitate obtained?
Question 24 :
Match the following with correct response.
(1) Oxidation
(2) Reduction
(3) Reducing agent
(4) Oxidising agent
(A) Gain of electron
(B) Electron accepting species
(C) Electron losing species
(D) Loss of electron
Question 25 :
Which one of the following four metals would be displaced from the solution of its salts by other three metals?