Download App

Periodic Classification of Elements — Science STD 10 — Question

Maharashtra BoardEnglish MediumSTD 10SciencePeriodic Classification of Elements4 Marks
Question
State whether the following statements are true or false:
According to Mendeleev’s periodic law, the properties of elements are a periodic function of their atomic numbers.
✓

Answer

False.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Case study." from Periodic Classification of Elements→Periodic Classification of Elements — all question types→Science STD 10 question papers→Maharashtra Board STD 10 question papers→Maharashtra Board question paper generator→

Similar questions

How are the food stuffs and their nutrient contents useful for body?
→
Give examples of different proteins formed in various parts of our body from amino acids:
→
A student made an electric circuit shown here to measure the current through two lamps.
  1. Are the lamps in series or parallel?
  2. The student has made a mistake in this circuit. What is the mistake?
  3. Draw a circuit diagram to show the correct way to connect the circuit. Use the proper circuit symbols in your diagram.
→
State whether the following statement is true or false:
On going down in a group of the periodic table, the number of valence electrons increases.
→
State whether the following statements are true or false:
The elements in a group have consecutive atomic numbers.
→
Explain glycolysis in detail.
→
The calorific values of five fuels A, B, C, D and E are given below:
(A) 48kJ/ g
(B) 17kJ/ g
(C) 150kJ/ g
(D) 50kJ/ g
(E) 30kJ/ g
  1. Which of the fuels could be: (i) cooking gas (ii) alcohol (iii) wood (iv) hydrogen (v) kerosene?
→
The table below shows the current in three different electrical appliances when connected to the 240V mains supply:
Appliance Current
Kettle 8.5A
Lamp 0.4A
Toaster 4.8A
  1. Which appliance has the greatest electrical resistance? How does the data show this?
  2. The lamp is connected to the mains supply by using a thin, twin-cored cable consisting of live and neutral wires. State two reasons why this cable should not be used for connecting the kettle to the mains supply.
  3. Calculate the power rating of the kettle when it is operated from the 240V mains supply.
  4. A man takes the kettle abroad where the mains supply is 120V. What is the current in the kettle when it is operated from the 120V supply?
→
A boy noted the readings on his home’s electricity meter on Sunday at 8AM and again on Monday at 8AM (see figure below).
  1. What was the meter reading on Sunday?
  2. What was the meter reading on Monday?
  3. How many units of electricity have been used?
  4. In how much time these units have been used?
  5. If the rate is Rs. 5 per unit, what is the cost of electricity used during this time?
→
State whether the following statements are true or false:
Newlands divided the elements into horizontal rows of eight elements each.
→