CBSE ADDA

  Attempt Quiz 1. The muscular tissue which function throughout the life continuously without fatigue is A. skeletal muscle B. cardiac muscle 2. While doing work and running, you move your organs such as hands, legs, etc., which among the following is correct? A. skeletal muscles contract and pull the tendon to move the bones B. skeletal muscles contract and pull the ligament to move the bones 3. Voluntary muscles are found in A. iris of the eye B. alimentary canal C. bronchi of lungs D. limbs 4. A person met with an accident in which two long bones of hand were dislocated. Possible reason is broken A. Tendon B. Cartilage C. Ligament 5. Bone matrix is rich in A. calcium and phosphorus B calcium and potassium 6. Which of the following helps in repair of tissue and fills up the space inside the organ? A. Adipose tissue B. Areolar tissue 7. Fats are stored in human body in A. Adipose tissue B. Areolar tissue 8. Cartilage is not found in A. Ear B. Nose C. kidney D. Larynx 9. Which is the f

  1. Which of the following statements about the given reaction are correct? 3Fe (s)  + 4H 2 O (g)  => Fe 3 O 4(s)  + 4H 2(g) (i) Iron metal is getting oxidised (ii) Water is getting reduced (iii) Water is acting as reducing agent (iv) Water is acting as oxidising agent (a) (i), (ii) and (iii) (b) (iii) and (iv) (c) (i), (ii) and (iv) (d) (ii) and (iv)   2.In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide is formed. While performing the activity if lead nitrate is not available, which of the following can be used in place of lead nitrate?  (a) Lead sulphate  (b) Lead acetate  (c) Potassium sulphate 3. A solution of X is used for white washing walls. it reacts slowly with Y in air to form a thin layer of B on walls which gives walls a shiny finish. which of the following options correctly represents X,Y and B ?   a) X =slaked lime , Y = nitrogen , B=calcium oxide b